Who should use TurnStage?

TurnStage is a B2B product built for developers building and testing LLM applications.

What platforms does TurnStage run on?

TurnStage runs on the web, Windows, macOS, and Linux.

Is TurnStage still active?

Unverified. TurnStage has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What are alternatives to TurnStage?

Similar projects tracked by PulseGate include mendmark-evals, harness-bench-fast, and Ship or Slop.

TurnStage is developed by TurnStage.

How long has TurnStage been around?

TurnStage first shipped in 2026.

Back to the index

TurnStage

Name: TurnStage
Author: TurnStage

visualstudio.comAgent evaluation & testing

TurnStage is a VS Code extension for testing LLM chat and agent APIs. It provides streaming diagnostics, regression suites, adversarial test cases, and evidence capture for developers evaluating AI integrations.

WebWindowsmacOSLinux

Visit visualstudio.com

Overview

7 features

TurnStage sits in PulseGate's Agent evaluation & testing category. It helps developers evaluate LLM chat and agent APIs for regressions, adversarial behavior, and streaming failures. It is built as a B2B product for developers building and testing LLM applications. It runs on the web, Windows, macOS, and Linux.

Behind TurnStage is TurnStage, and it first shipped in 2026. Key capabilities include streaming diagnostics, regression suites, and red-team cases.

Streaming diagnostics
Regression suites
Red-team cases
Agent testing
Chat testing
Evidence capture
API testing

Built with & integrations

Connectors

vscodegithub

Runs on

BrowserWindowsmacOSLinux

Trust & compliance

Verified signals

HTTPSStore-verified publisher

Indexing history

What PulseGate has recorded for this listing

Indexed11 Sept · 11:25 UTC
TurnStage verified via VS Code Marketplace
Source: VS Code Marketplace · Open

Frequently asked questions about TurnStage

What is TurnStage?: TurnStage helps developers evaluate LLM chat and agent APIs for regressions, adversarial behavior, and streaming failures. It is catalogued under Agent evaluation & testing on PulseGate.
Who should use TurnStage?: TurnStage is a B2B product built for developers building and testing LLM applications.
What platforms does TurnStage run on?: TurnStage runs on the web, Windows, macOS, and Linux.
Is TurnStage still active?: Unverified. TurnStage has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What are alternatives to TurnStage?: Similar projects tracked by PulseGate include mendmark-evals, harness-bench-fast, and Ship or Slop.mendmark-evals harness-bench-fast Ship or Slop
Who makes TurnStage?: TurnStage is developed by TurnStage.
How long has TurnStage been around?: TurnStage first shipped in 2026.

At a glance

Platforms: Web
Languages: English
First seen: 11 Sept 2026
Built for: developers building and testing LLM applications
Model: B2B
Solves: Helps developers evaluate LLM chat and agent APIs for regressions, adversarial behavior, and streaming failures.

Registered as

VS Code Marketplace: turnstage.turnstage

Index record

Indexed: 11 Sept 2026
Lifecycle: Alive
First seen: Sept 2026
Last seen: 11 Sept 2026

Identity audit (13)

Slug: turnstage-visualstudio-com
Lifecycle state recorded: 11 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 11 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Taken from the project's own store listing.
Languages from: Detected by a language model from page content.
Last updated: 11 Sept 2026
Canonical URL: https://marketplace.visualstudio.com/items?itemName=turnstage.turnstage

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Also in Agent evaluation & testing

Same category — not a similarity match